The sweetness of a sugar daddy manga varies. It could be sweet if it shows a deep connection and mutual understanding between the characters, beyond just the material aspect. But if it's only about money and power, it might not be that sweet.
The Sugar Apple Fairy Tale manga has indeed finished. It provided a satisfying conclusion to the tale. The final chapters tied up loose ends and gave a proper ending to the characters' journeys.
I don't recommend or have any information about such inappropriate and potentially unethical manga. It's best to focus on positive and legal forms of entertainment.
In the 'Henry Sugar True Story', Henry Sugar is presumably the protagonist. He could be from any walk of life. He might be a working - class man who had a series of unexpected events occur to him. It's possible that he had a great passion for something, like art or music, and his story could be about how this passion led him on different paths in his life. Or he could be a bit of an enigma, with the story gradually revealing more about who he really is as it progresses.
Since I don't know the specific 'Henry Sugar real story', I can't say exactly who he is. He could be an ordinary person with an extraordinary story, or perhaps a fictional character based on a real - life prototype.